body{
    margin: 25px;
}

header{
    padding: 20px;
    height: 300px;
    background-image: url(../img/header_backgroud.jpg);
    background-repeat: no-repeat;
    background-size: 100%;
    background-position: center;
    text-align: center;
}
header ul{
    padding: 0;
    margin: 0;
    list-style-type: none;
}
header ul li{
    display: inline-block;
    margin-right: 10%;
}
header ul li a{
    color:whitesmoke;
}
section{
    padding: 5%;
    background: white;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}
section figure img{
    border: 1px solid white;
    box-shadow: gray 0 0 10px;
    width: 260px;
    height: 200px;
    margin: auto;
    border-radius: 50%;
    
}
section figure figcaption{
    text-align: center;
}
div{
    background: red;
    margin: auto;
    width: 100px;
}
footer{
    padding: 5%;
    background: black;
    color: aliceblue;
}
@media screen and (max-width: 820px){

    header{
        height: 200px;
        padding: 1%;
    }
}
@media screen and (max-width: 400px){
    header{
        height: 100px;
        padding: 0.5%;
    }
}